18-Volt - Super Mario Wiki, the Mario encyclopedia

18-Volt is a major human character in the WarioWare series. He is a great friend of 9-Volt and shares his love of video games. 18-Volt makes his first appearance in WarioWare: Twisted!, where he becomes a new student at Diamond City Elementary and soon befriends 9-Volt. In the original Japanese versions

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Super Mario Wiki on X: 18-Volt's age in the WarioWare series is left vague - except the French dub of WarioWare Gold, where he states himself to be 9-years old. /